Abstract:

As a typical representative of the new generation of information technology, the value and significance of Internet of things (IoT) has been widely recognized by the countries all over the world. At the same time, IoT is facing serious scalability and security challenges. For the purpose of improving the security of the IoT, this paper takes IoT and blockchain as the research object, presents the six-domain model of IoT, studies the data format of blockchain, analyzes the security threats faced by IoT, explains the integration framework of IoT and blockchain, and elaborates the IoT security solutions based on the blockchain. This paper designs the detailed IoT behavior regulation workflow, pricing-based resource allocation algorithm and credit-based behavior management system, and conducts extensive experiments to evaluate the proposed scheme. The results show that while gaining the security benefits of blockchain and smart contracts, the cost of integrating them into IoT security scheme is within a reasonable and acceptable range.

Key words: blockchain, Internet of things, security scheme, six-domain model, data format